On our target, we want to add a new linkage type "attribute" (or something similar), orthogonal to the linkage types used. However, I see that only _one_ linkage type can be specified for each function (despite the composite nature of some of the existing linkage types).
Should I duplicate all linkage types that we use (for example, like weak and linkonce are duplicated into weak_odr and linkonce_odr), or are there some other option?
In more detail: We have a frontend pragma that controls if calls for a given function declaration should be absolute, instead of PC-relative (which is the default). This affects some aspects of the linkage process. How should the LLVM assembler be extended to pass this information?